func (offerHelper *OfferHelper) Operations() []*mesos.Offer_Operation {
operations := []*mesos.Offer_Operation{}
if len(offerHelper.TasksToLaunch) > 0 {
operations = append(operations, util.NewLaunchOperation(offerHelper.TasksToLaunch))
}
if len(offerHelper.VolumesToDestroy) > 0 {
operations = append(operations, util.NewDestroyOperation(offerHelper.VolumesToDestroy))
}
if len(offerHelper.ResourcesToUneserve) > 0 {
operations = append(operations, util.NewUnreserveOperation(offerHelper.ResourcesToUneserve))
}
if len(offerHelper.ResourcesToReserve) > 0 {
operations = append(operations, util.NewReserveOperation(offerHelper.ResourcesToReserve))
}
if len(offerHelper.VolumesToCreate) > 0 {
operations = append(operations, util.NewCreateOperation(offerHelper.VolumesToCreate))
}
return operations
}
func (sched *ExampleScheduler) ResourceOffers(driver sched.SchedulerDriver, offers []*mesos.Offer) {
for _, offer := range offers {
operations := []*mesos.Offer_Operation{}
resourcesToCreate := []*mesos.Resource{}
resourcesToDestroy := []*mesos.Resource{}
resourcesToReserve := []*mesos.Resource{}
resourcesToUnreserve := []*mesos.Resource{}
taskInfosToLaunch := []*mesos.TaskInfo{}
totalUnreserved := 0
unreservedCpus, unreservedMem, unreservedDisk := getUnreservedResources(offer.Resources)
reservedCpus, reservedMem, reservedDisk := getReservedResources(offer.Resources)
log.Infoln("Received Offer <", offer.Id.GetValue(), "> with unreserved cpus=", unreservedCpus, " mem=", unreservedMem, " disk=", unreservedDisk)
log.Infoln("Received Offer <", offer.Id.GetValue(), "> with reserved cpus=", reservedCpus, " mem=", reservedMem, " disk=", reservedDisk)
for _, task := range sched.tasks {
switch task.state {
case InitState:
if CPUS_PER_TASK <= unreservedCpus &&
MEM_PER_TASK <= unreservedMem &&
DISK_PER_TASK <= unreservedDisk {
resourcesToReserve = append(resourcesToReserve, []*mesos.Resource{
util.NewScalarResourceWithReservation("cpus", CPUS_PER_TASK, *mesosAuthPrincipal, *role),
util.NewScalarResourceWithReservation("mem", MEM_PER_TASK, *mesosAuthPrincipal, *role),
util.NewScalarResourceWithReservation("disk", DISK_PER_TASK, *mesosAuthPrincipal, *role),
}...)
resourcesToCreate = append(resourcesToCreate,
util.NewVolumeResourceWithReservation(DISK_PER_TASK, task.containerPath, task.persistenceId, mesos.Volume_RW.Enum(), *mesosAuthPrincipal, *role))
task.state = RequestedReservationState
unreservedCpus = unreservedCpus - CPUS_PER_TASK
unreservedMem = unreservedMem - MEM_PER_TASK
unreservedDisk = unreservedDisk - DISK_PER_TASK
}
case RequestedReservationState:
if CPUS_PER_TASK <= reservedCpus &&
MEM_PER_TASK <= reservedMem &&
DISK_PER_TASK <= reservedDisk &&
resourcesHaveVolume(offer.Resources, task.persistenceId) {
taskId := &mesos.TaskID{
Value: proto.String(task.name),
}
taskInfo := &mesos.TaskInfo{
Name: proto.String("go-task-" + taskId.GetValue()),
TaskId: taskId,
SlaveId: offer.SlaveId,
Executor: task.executor,
Resources: []*mesos.Resource{
util.NewScalarResourceWithReservation("cpus", CPUS_PER_TASK, *mesosAuthPrincipal, *role),
util.NewScalarResourceWithReservation("mem", MEM_PER_TASK, *mesosAuthPrincipal, *role),
util.NewVolumeResourceWithReservation(DISK_PER_TASK, task.containerPath, task.persistenceId, mesos.Volume_RW.Enum(), *mesosAuthPrincipal, *role),
},
}
taskInfosToLaunch = append(taskInfosToLaunch, taskInfo)
task.state = LaunchedState
reservedCpus = reservedCpus - CPUS_PER_TASK
reservedMem = reservedMem - MEM_PER_TASK
reservedDisk = reservedDisk - DISK_PER_TASK
log.Infof("Prepared task: %s with offer %s for launch\n", taskInfo.GetName(), offer.Id.GetValue())
}
case FinishedState:
resourcesToDestroy = append(resourcesToDestroy,
util.NewVolumeResourceWithReservation(DISK_PER_TASK, task.containerPath, task.persistenceId, mesos.Volume_RW.Enum(), *mesosAuthPrincipal, *role))
resourcesToUnreserve = append(resourcesToUnreserve, []*mesos.Resource{
util.NewScalarResourceWithReservation("cpus", CPUS_PER_TASK, *mesosAuthPrincipal, *role),
util.NewScalarResourceWithReservation("mem", MEM_PER_TASK, *mesosAuthPrincipal, *role),
util.NewScalarResourceWithReservation("disk", DISK_PER_TASK, *mesosAuthPrincipal, *role),
}...)
task.state = UnreservedState
case UnreservedState:
totalUnreserved = totalUnreserved + 1
}
}
// Clean up reservations we no longer need
if len(resourcesToReserve) == 0 && len(resourcesToCreate) == 0 && len(taskInfosToLaunch) == 0 {
if reservedCpus >= 0.0 {
resourcesToUnreserve = append(resourcesToUnreserve, util.NewScalarResourceWithReservation("cpus", reservedCpus, *mesosAuthPrincipal, *role))
}
if reservedMem >= 0.0 {
resourcesToUnreserve = append(resourcesToUnreserve, util.NewScalarResourceWithReservation("mem", reservedCpus, *mesosAuthPrincipal, *role))
}
if reservedDisk >= 0.0 {
filtered := util.FilterResources(offer.Resources, func(res *mesos.Resource) bool {
return res.GetName() == "disk" &&
res.Reservation != nil &&
res.Disk != nil
})
for _, volume := range filtered {
resourcesToDestroy = append(resourcesToDestroy,
util.NewVolumeResourceWithReservation(
volume.GetScalar().GetValue(),
volume.Disk.Volume.GetContainerPath(),
volume.Disk.Persistence.GetId(),
volume.Disk.Volume.Mode,
*mesosAuthPrincipal,
*role))
}
resourcesToUnreserve = append(resourcesToUnreserve, util.NewScalarResourceWithReservation("mem", reservedDisk, *mesosAuthPrincipal, *role))
}
}
// Make a single operation per type
if len(resourcesToReserve) > 0 {
operations = append(operations, util.NewReserveOperation(resourcesToReserve))
}
if len(resourcesToCreate) > 0 {
operations = append(operations, util.NewCreateOperation(resourcesToCreate))
}
if len(resourcesToUnreserve) > 0 {
operations = append(operations, util.NewUnreserveOperation(resourcesToUnreserve))
}
if len(resourcesToDestroy) > 0 {
operations = append(operations, util.NewDestroyOperation(resourcesToDestroy))
}
if len(taskInfosToLaunch) > 0 {
operations = append(operations, util.NewLaunchOperation(taskInfosToLaunch))
}
log.Infoln("Accepting offers with ", len(operations), "operations for offer", offer.Id.GetValue())
refuseSeconds := 5.0
if len(operations) == 0 {
refuseSeconds = 5.0
}
driver.AcceptOffers([]*mesos.OfferID{offer.Id}, operations, &mesos.Filters{RefuseSeconds: proto.Float64(refuseSeconds)})
if totalUnreserved >= len(sched.tasks) {
log.Infoln("Total tasks completed and unreserved, stopping framework.")
driver.Stop(false)
}
}
}